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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-181 STEP 6. Measure the sensor supply voltage at ECM ECU check harness special tool MB992110 between the (2) Disconnect the intake air temperature sensor 1 connector A-07. (3) Turn the ignition switch to the "ON" position. (4) Measure the voltage between terminal No. 89 and ground. • Voltage should be between 4.5 and 4.9 volts. (5) Turn the ignition switch to the "LOCK" (OFF) position. YES : Repair harness wire between intake air temperature sensor 1 connector A-07 (terminal No. 1) and ECM NO : Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP 42B, ID Code or GROUP 42C, ID Codes Registration Judgment Table <Vehicles with WCM> STEP 7. Check the continuity at intake air temperature side. (2) Check for the continuity between terminal No. 4 and ground. • Continuity (2 ohms or less) Q: Does continuity exist? YES : Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP 42B, ID Code or GROUP 42C, ID Codes Registration Judgment Table <Vehicles with WCM> NO : Go to Step 8. AK604171 ECM AB Body side harness MB992110 82 81 80 79 78 77 76 75 74 73 72 71 94 93 92 91 90 89 88 87 86 85 84 83 99 98 97 96 95 100 101 102 103 104 105 106 112 113 114 109 108 107 110 111 115 116 117 118 AK604179 AB Power plant ECU AK704236 2 1 3 4 A-07 harness AB |